I was following this test case: http://fedoraproject.org/wiki/User:Jjelen/Draft/Testcase_OpenSSH_eBPF
In a nutshell, putting
in /etc/systemd/system/sshd.service.d/filter.conf doesn't have any effect (after systemctl daemon-reload and restarting sshd).
I'm still able to ssh on localhost.
The same steps performed on an x86_64 host are working as expected.
Fedora-Minimal-armhfp-28 on a Raspberry Pi 3
# systemctl status sshd
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2018-03-22 18:37:38 CET; 12min ago
Main PID: 1512 (sshd)
Tasks: 1 (limit: 2138)
└─1512 /usr/sbin/sshd -D -oCiphers=aes256-gcm,chacha20-poly1305,aes256-ctr,aes256-cbc,aes128-gcm,aes128-ctr,aes128-cbc -oMACs=hmac-sha2-256-etm@>
Mar 22 18:37:38 localhost systemd: Starting OpenSSH server daemon...
Mar 22 18:37:38 localhost sshd: Server listening on 0.0.0.0 port 22.
Mar 22 18:37:38 localhost sshd: Server listening on :: port 22.
Mar 22 18:37:38 localhost systemd: Started OpenSSH server daemon.
As far as I can see, /etc/systemd/system/sshd.service.d/filter.conf is taken into account since if I put a wrong parameter, systemct staus complains about it.
Is it expected that eBPF filtering doesn't work on arm?
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